Air cleaner



May 1929- A. L. VMCLEAN AIR CLEANER Filed Aug. 1'7, 192'? 2 Sheets-Sheet l 1 W iinnmuiii abtoznm l Snow 1 60c A. L. M LEAN May 21, 1929.

AIR CLEANER 1927 2 Sheets-Sheet Filed Aug adieu/wag;

Patented May 21, 1929.

UNITED STATES NT OFFICE.

AUGUSTUS L. MCLEAN, OF ASEEVILLE, NORTH GARGLINA AIR CLEANER.

Application filed August 1?, 1927. Serial No. 213,681. 7

This invention provides means for the removal of dust, lint and other impurities from air supplied to air heating furnaces for warming dwellings, buildings and structures of abode and assemblage, thereby insuring pure air for respiration and obviating the depositing of dust on walls, hangings, interior finishings and furniture as commonly experienced in hot air heating where no provision is made for eliminating the impurities from the air admitted to the furnace to be heated anddistributed to the rooms and other places to be made comfortable in cold weather.

The invention contemplates an air cleaner interposed in the length of the cold air supplying pipe, which separates the impurities from the air, the bulk of the impurities passing oif through the smoke flue and the remaining impurities collecting and being removable as occasion may require. p

The invention provides a cleanerwhich may be installed in a limited space and which insures'a positive draft for carrying off the impurities separated from the air.

The invention furthermore provides a device of the character aforesaid which is readily accessible and provided with means for dislodgment of the impurities tending to collect on the separating means. j

l/Vhile the drawings illustrate 'a preferred embodiment of the invention, it is to be understood that in adapting the means to meet specific needs and requirements the design may be varied and such other changes in the minor details of construction maybe resorted to within the scope of the invention as claimed, Without departing from the spirit thereof.

For a full understanding of the invention and the merits thereof, reference is to be had to the following description and the drawings hereto attached, in which,

Figure 1 is an elevational view of a hot air furnace provided with an air cleaner, embodying the invention.

Figure 2 is an enlarged sectional view of the cleaner on the line 22 of Figure 1, looking in the direction of the arrows.

as Figure 5 is a fragmentary perspective Figure 3 is a plan "sectional 'view on the view of a portion of afiltering damper, the parts being separated.

Figure 6 is a fragmentary sectional view of the dust collecting mat."

Corresponding and like parts are referred to in the following description and desig nated in the several views of the drawings by like reference characters.

The numeral 1 designates a hot air furnace such as commonly provided for heating air and distributing the same. The numeral 2 designates the pipes for distributing the hot air. The smoke fine is designated by the numeral 3, and 4 designates the dust pipe which connects the cleaner with the smoke flue. The pipe 5 supplying air to the jacket of the furnace 1 is designated by the numeral 5, and the cleaner is interposed in the length of this pipe and comprises 'a body 6 which is provided at its top and sides with collars to which parts of the pipe 5 are coupled in a manner common in connecting pipe joints. The body 6fconsists of a casing and is usually formed of sheet metal, and is of a size and shape best adapted for the particular installation. A trap 7 is disposed within the lower portion of the body or casing 6. The lower portion of the. trap 7 tapers towards an outlet 8 which is in communication with a pipe 9 which in effect forms an extension of the dust pipe 4-. The pipe 9 is disposed horizontally and projects beyond opposite sides of the body or casing 6 and is closed at one end by means of a cap 10 and its opposite end connects with a box 11. A plurality of bafiles 12 are disposed within the trap 7 and the lower portions converge to direct the dust and other impurities separated from the air towards the outlet-8. A mat 13 is removably fitted within the upper portion of the trap 7 and is usually supported upon the upper ends of the baiiles 12. The mat 13 is of a natureto check the too free passage of air therethrough without preventing the passage of dust. The mat usually consists of a metal: frame 14 and spaced coverings 15 of wire gauze between which a filling of metal filings or steel woolis provided.

Two filtering dampers 16 are located within the upper portion of the body'6 above the trap and upon opposite sides of the opening in the top to which the air supplying pipe 5 is coupled. These dampers 16' are pivoted at their lower ends as as to swing inward and downward, whereby provision is had for ready removal and cleaning of thedampers-asjrequired. The dampers 16, as well as the dust collecting mat .18, are removable through an opening in a side of the body or casinglfi and which opening is normally closed by means of a cover or door 17 slidable in ways provided upon the casing at each side of the opening. As indicated most-clearly in Figure '5 of the drawings, each of the; dampers includes a metal frame 18, a: pivot bar 19 secured to the lower mem- I ,ber of the frame .18 and a screen 20 which is r'einovably fitted to the frame 18 and com clearly in Eig'ures andfltofithedrawings.

'Sp ee l .2 are m nde eh pp i sides t t e epe te in me hani m, a t e spa ee he'e w i h the d pe ng to wh ch t e h rizehte r tt en e 'th e p is 1 pied, as indicated .inos t clear y in Figures 2, and fl of the drawings,

' is located? above th m fi 1. and below the fi te in em e en i slid able, b ing uppo ted and di e t d n i s m m n hy e ii e 'fl u ie e upne ed a t ei end ppe e s d s f i h h dy .e eas ng" .6- 'Alhehd e 27 onn t d he '-t e' he h125 p j e te t r u h .e .e d e th h dy of ea ng fi n Pr v s lee ve en m a s f r n eet ng th b u h Te r medust orjother matter fadherin vto the ,filtering dampers theygare swung rom a vertical to ,a horigontal position, thereby bringing the dust collecting side of the damper in contact with the brushlZb [which is reciproeted, t t y l e ging end em i th foreign matter .from'the damper. Each of the dampers isclea'ned separately. The .texi e e em n e the? fil e e pe @is die posed inwardly," hence arrests the dust-and e e a te wh may he r mov in the manner indicated, The down draft through the cleaner t$ istsinaterially inholding the textile filtering or [separating element contact with the brush, thereby assuring thorough removal of the matter tending to adhere to the damper. The matter thus removed from the filteringdampera may be, if desired, removed from the mat through the openingclosed bymeansof the cover orldoor 17. The separating screen .of the filtering dampers Jnay also be removed through the ep n ihg. lo e by e ns e t e eeve er -so that 'it will be heated from the furnace and thereby accellerate the draft through thedust pipe 4. That portion of the dust ,bonnearest the furnace is preferably made of copper or other metal which will readily absorb heat sons to warm-the air circulating through the box 11.

In practice the cleaner is interposed in the l n t e the ai upp i P pe 5' and t airgentering the upper portion of thepipe 5 passes into the cleaner between the filtering dampe s 6, th me a era ly h o sa d dampers into the spaces 24' and laterally thre h th d O eni end he z n l p tionofthe pipe 5 into the jacket of the'furnaceto beheated and distributed in a manner well understood. The airentering that portion of the cleaner comprised betweenthe trap and the filtering dampers 16 is purified by having any dust or other foreign matter rem ed here r m- A m l propo t n. f the air entering andflowing through the casing 6 passesdownwardly through the mat .13 and into the pipe 9 andcarries along therewith the [dust separated from the air.

.Having thus described the invention, I cla J i n Y 1. An air cleaner of the character specified comprising a casing having an inlet and an outlet, a ffiltering damper pivotally .inou-nted within the casing, atrap, adus't collecting m diep ed e e he p, end a b s movable ov'er'the said mat and adapted to contact with the brush.v

2. Anaircleaner ofthe character specified comprising ajcasing having an inlet, and an outlet, atrap within the casing adjacent the outlet, a filtering damper pivotally mounted withiiithe Casii ijadjacent the inlet,.a dust collecting mat isposed overthe receiving end'of (the trapp and abrush disposed to operate between'the said mat and the filterin mpe -fl' W 3. Anair cleaner Qfor'hot air furnaces, the same ,cqrnprising a casing having an'inlet and an outlet and provided in asidewith n re -ins Whieh' is n m l e y means of a door, a trap within the lower portion of the casing, adust collecting mat extending over the trap, ,a reciprocating brush arranged above vthe said mat, {filtering dampers pivotally mounted within the upper portion of the casing uponfopposi-te sides of the inlet, and'inat, each including a screen, which with the mat,is removable through h d 'hpe i a dust P p ndi dust box connected With the dust pipe, and 5. An air cleaner for hot air furnaces com a pipe connecting the box with the smoke prising a casing having an inlet and an flue. outlet, a dust trap Within the casing adja- 15 4. An air cleaner for hot air furnaces comcent the outlet, a brush operable across the 5 prising a casing having an inlet and an outtrap, and filtering dampers at the sides of let, a dust trap Within the casing adjacent the trap and brush and pivoted to overlie the outlet, a brush operable across the trap, the brush and trap to admit of the dust reand a filtering damper at one side of the trap moved therefrom by the brush discharging 20 and between the inlet and the outlet of the directly into the trap.

1 casing and movable to overlie the brush and In testimony whereof I aflix my signature.

trap to discharge the dust detached therefrom by the brush directly into the trap. AUGUSTUS L. McLEAN. [n s.] 

